function writeHeader() {    // 
document.write('<table width="95%" border="0" cellspacing="0" cellpadding="0">');
document.write('<tr valign="top">');
document.write('<td valign="bottom"  align="left"> ');
document.write('<br>');
document.write('<img  src="/chemphys/gov/images/main-title.jpg" alt="Dr. Nir Gov" border="0">');
document.write('</td>');
document.write('<td align="right"  valign="bottom" >');
document.write('<br>');
document.write('<a href="http://www.weizmann.ac.il"><img border="0" align="center" src="/chemphys/tannor/images/semel.jpg"   ALT="Weizmann Logo"></a></td>');
document.write('</tr>');
document.write('</table>');
document.write('<br>');
document.write('<br>');
}